When is his artery getting cleaned out? If they put you on hold e-mail them or write them a letter telling them that you live 300 miles away, you tried to call them but are being put on hold, give them your phone #, your e-mail address , tell them when your father-in-law's procedure will be done, and that you have questiions BEFORE the procedure, and about the procedure, and thereafter.
Or go on Google and type in your questions in their search box you should get some information. Or try to post your questions on the "ask the doctor" forum. They have a limit for so many questions per day that is why I suggested also to go on Google.
We are 300 miles away and get put on hold!
What did the doctor say who will be cleaning out your father-in-law's carotid artery? What did or his staff tell himconcerning hospital stay and home care?. Did your 92 yr old father-in-law go to the doctor by himself? If so, you might want to call his doctor's office and ask these questions.